At the first working meeting of the 'Key Technical Standard PromotionProject', an important project of the national scientific and technical support plan during the'11th Five Year' held recently in Bei...At the first working meeting of the 'Key Technical Standard PromotionProject', an important project of the national scientific and technical support plan during the'11th Five Year' held recently in Beijing, the first group of 11 research topics for the 'KeyTechnical Standard Promotion Project' was formally introduced. According to Ms. Yu Xinli, who is incharge of the project as Deputy Director of the China National Institute of Standardization, theproject comprises four aspects: the international standards key breakthrough project, the technicalstandards promotion project of adapting technical trade measures, the technical standards innovationproject of basic public welfare, and the technical standard enhancement project of public security.展开更多
Simply-supported tied arch is a zero-thrust arch bridge with clear structural force,large stiffness,low height,beautiful appearance and economic efficiency.In Xuzhou-Shanghai section of Beijing-Shanghai HSR,the simply...Simply-supported tied arch is a zero-thrust arch bridge with clear structural force,large stiffness,low height,beautiful appearance and economic efficiency.In Xuzhou-Shanghai section of Beijing-Shanghai HSR,the simply-supported tied arch is systematically studied and widely applied for the first time.A total of 21 simplysupported tied arch bridges with the spans of 96 m,112 m and 128 m respectively are constructed for the route.The simply-supported tied arch is an external static and internal super-static parallel arch or basket arch of Nielsen system in structure;single-box,threechamber and equal-height prestressed concrete box girder is adopted for the tie beam;dumbbell steel pipe concrete section is adopted for the arch rib;PES(FD)low-stress anticorrosion cable body is adopted for the suspender.The rational structural form is determined by comparative study on the key technical parameters such as the layout form of suspender,rise-span ratio and arch axis alignment.This paper summarizes the optimization of simplysupported tied arch structure and looks forward to the development of bridge structure.展开更多
文摘At the first working meeting of the 'Key Technical Standard PromotionProject', an important project of the national scientific and technical support plan during the'11th Five Year' held recently in Beijing, the first group of 11 research topics for the 'KeyTechnical Standard Promotion Project' was formally introduced. According to Ms. Yu Xinli, who is incharge of the project as Deputy Director of the China National Institute of Standardization, theproject comprises four aspects: the international standards key breakthrough project, the technicalstandards promotion project of adapting technical trade measures, the technical standards innovationproject of basic public welfare, and the technical standard enhancement project of public security.
文摘Simply-supported tied arch is a zero-thrust arch bridge with clear structural force,large stiffness,low height,beautiful appearance and economic efficiency.In Xuzhou-Shanghai section of Beijing-Shanghai HSR,the simply-supported tied arch is systematically studied and widely applied for the first time.A total of 21 simplysupported tied arch bridges with the spans of 96 m,112 m and 128 m respectively are constructed for the route.The simply-supported tied arch is an external static and internal super-static parallel arch or basket arch of Nielsen system in structure;single-box,threechamber and equal-height prestressed concrete box girder is adopted for the tie beam;dumbbell steel pipe concrete section is adopted for the arch rib;PES(FD)low-stress anticorrosion cable body is adopted for the suspender.The rational structural form is determined by comparative study on the key technical parameters such as the layout form of suspender,rise-span ratio and arch axis alignment.This paper summarizes the optimization of simplysupported tied arch structure and looks forward to the development of bridge structure.
